/Engine/Source/Runtime/Slate/Public/Framework/MultiBox/MultiBox.h
Adds a widget to SearchElement map, making the widget searchable
void AddSearchElement ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) >, [FText](API\Runtime\Core\Internationalization\FText) )